Bis benzothiophene Schiff bases: synthesis and in silico-guided biological activity studies

Authors: YASEMİN ÜNVER, DİLEK ÜNLÜER, ŞAHİN DİREKEL, SERDAR DURDAĞI

Abstract: Since benzo [$b$] thiophene scaffold is one of the privileged structures in drug discovery as this core exhibitsactivities for different biological problems, in this study bis (benzo[$b$]thiophene-2-yl) alkyl methanimine derivatives (1-9) were synthesized by reacting benzo[$b$]thiophene-2-carbaldehyde with diamines. All newly compounds were characterized by IR, $^{1}$H NMR and $^{13}$C NMR spectroscopic methods. Synthesized compounds were investigated using binary QSAR-based models on therapeutic activity prediction of synthesized compounds and they showed high predicted activities in following diseases: bacterial, angina, allergy, depression and obesity. Thus, they were then tested for their antimicrobial and antileishmanial activities as a result of this theoretical study. Compound 1(N, N'- (propane-1,3-diyl) bis (1-(benzo [$b$] thiophene-2-yl)) methanimine) was found the most active compound in both diseases. Thus, its molecular docking studies were also carried out.

Keywords: Benzo [$b$] thiophene, Schiff base, binary QSAR models, molecular docking, antimicrobial and antileishmanial activities

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